Dual layer weighing module and weighing apparatus comprising the same

Abstract

The utility model provides a kind of double-layer weighing module and the weighing device comprising it, the double-layer weighing module includes: upper mounting plate and first weighing sensor, first weighing sensor is installed on the lower end surface of upper mounting plate;Lower mounting plate and second weighing sensor, second weighing sensor is installed on the upper end surface of lower mounting plate, the loading end of first weighing sensor and the loading end of second weighing sensor are opposite up and down;Rocking column assembly is installed between the loading end of first weighing sensor and second weighing sensor, and the weight of the material to be weighed is transmitted to second weighing sensor by rocking column assembly.The utility model uses two weighing sensors arranged oppositely up and down, respectively obtains weighing weight, by comparing weighing weight, can find the condition of weighing error in time, realizes the real-time monitoring of the feeding and feeding reduction of the object to be weighed, prevents the failure of weighing module.

Description

Technical Field

[0001] This utility model relates to the field of weighing, and in particular to a double-layer weighing module and a weighing device including the same. Background Technology

[0002] In the current weighing field, the commonly used weighing module is a single-platform structure. This structure cannot meet the requirements of high precision and accuracy in demanding applications.

[0003] For example, in the application of batching tanks, in the entire weighing process, materials are weighed on a single scale and then directly enter the next batching step. If the single scale malfunctions, the material weighing will be inaccurate, and workers will be unable to identify or prevent weighing errors.

[0004] In this situation, the materials entering the batching process are inaccurate, meaning the batching has failed. This can easily lead to scrapping or waste in later batching stages or the entire process. The materials, after being weighed, still directly enter the next process step.

[0005] In view of this, the inventor of this utility model has designed a double-layer weighing module and a weighing device including the same, in order to overcome the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the defect that the weighing module in the prior art adopts a single scale platform structure and cannot detect weighing errors, and to provide a double-layer weighing module and a weighing device including the same.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A double-layer weighing module, characterized in that the double-layer weighing module comprises:

[0009] An upper mounting plate and a first weighing sensor, wherein the first weighing sensor is mounted on the lower end surface of the upper mounting plate;

[0010] The lower mounting plate and the second weighing sensor are mounted on the upper surface of the lower mounting plate, and the loading ends of the first weighing sensor and the second weighing sensor are vertically opposite each other.

[0011] A rocker assembly is installed between the loading ends of the first weighing sensor and the second weighing sensor, and the weight of the material to be weighed is transferred to the second weighing sensor through the rocker assembly.

[0012] According to one embodiment of the present invention, the first weighing sensor and the second weighing sensor are beam-type weighing sensors, the fixed end of the first weighing sensor is connected to the upper mounting plate, and the fixed end of the second weighing sensor is connected to the lower mounting plate.

[0013] The loading ends of the first and second weighing sensors are connected vertically via the rocker assembly.

[0014] According to one embodiment of the present invention, the rocker assembly includes a rocker and an adjusting pressure head, a first mounting hole is provided on the loading end of the first weighing sensor, and the first end of the rocker is installed in the first mounting hole;

[0015] The second load cell has a second mounting hole on its loading end, the adjusting head is installed in the second mounting hole, and the second end of the rocker column is connected to the adjusting head.

[0016] According to one embodiment of the present invention, the adjusting pressure head is provided with a third mounting hole, and the second end of the rocker column is installed in the third mounting hole.

[0017] According to one embodiment of the present invention, the first weighing sensor and the second weighing sensor are aligned vertically and horizontally.

[0018] According to one embodiment of the present invention, the double-layer weighing module further includes at least one pair of horizontal gap rods, one end of which is connected to the lower end face of the upper mounting plate and the other end is connected to the upper end face of the lower mounting plate, and is located on both sides of the first weighing sensor and the second weighing sensor.

[0019] According to one embodiment of the present invention, each of the horizontal clearance rods includes a horizontal rod, a first connecting post, and a second connecting post. The first connecting post is installed on the lower end face of the upper mounting plate, and the second connecting post is installed on the upper end face of the lower mounting plate. The two ends of the horizontal rod are respectively connected to the first connecting post and the second connecting post.

[0020] According to one embodiment of the present invention, the double-layer weighing module further includes a protective limiting device, which is installed between one end of the upper mounting plate and the lower mounting plate, thereby allowing for relative movement between the upper mounting plate and the lower mounting plate.

[0021] According to one embodiment of the present invention, the protective limiting device includes a positioning base and a connecting plate. The positioning base is fixed to the upper end face of the lower mounting plate, the first end of the connecting plate is fixed to the lower end face of the upper mounting plate, and the second end of the connecting plate is connected to the positioning base, and the connection has a movement gap.

[0022] Alternatively, the positioning base is fixed to the lower end face of the upper mounting plate, the first end of the connecting plate is fixed to the upper end face of the lower mounting plate, and the second end of the connecting plate is connected to the positioning base, with a movement gap at the connection point;

[0023] The relative movement between the upper mounting plate and the lower mounting plate is achieved through the movement gap.

[0024] According to one embodiment of the present invention, a connector is provided on the positioning base, and a horizontal first connecting hole is opened at the second end of the connecting plate. The connector passes through the first connecting hole, and there is a movement gap between the first connecting hole and the connector.

[0025] According to one embodiment of the present invention, the positioning base includes at least one side plate, and the connector is laterally fixed on the side plate.

[0026] According to one embodiment of the present invention, the positioning base includes a base plate and two side plates, the side plates being respectively arranged on both sides of the base plate and extending upward along the base plate;

[0027] A second connecting hole is provided on the side plate, the connecting plate extends between the side plates, and the connector passes through the first connecting hole and the second connecting hole to connect the connecting plate and the side plate.

[0028] According to one embodiment of the present invention, the protective limiting device further includes a limiting mechanism, which is detachably installed between the connecting plate and the positioning base.

[0029] According to one embodiment of the present invention, the limiting mechanism includes a base plate and two limiting plates, the limiting plates being respectively installed on both sides of the base plate and extending upward along both sides of the base plate;

[0030] The top of the limiting plate is provided with a boss to limit the position of the limiting mechanism.

[0031] This utility model also provides a weighing device, characterized in that the weighing device includes a double-layer weighing module as described above.

[0032] The positive and progressive effects of this utility model are as follows:

[0033] This utility model relates to a double-layer weighing module and a weighing device including the same, which employs two weighing sensors arranged vertically opposite each other. The two sensors acquire the weighing weight separately. By comparing the weighing weights, weighing errors can be detected in a timely manner, enabling real-time monitoring of the addition or subtraction of material to the object to be weighed, and preventing the weighing module from malfunctioning. Attached Figure Description

[0034] The above and other features, properties and advantages of this utility model will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features, wherein:

[0035] Figure 1 This is a perspective view of the double-layer weighing module of this utility model.

[0036] Figure 2 This is the front view of the double-layer weighing module of this utility model.

[0037] Figure 3 This is a side view of the double-layer weighing module of this utility model.

[0038] Figure 4 This is a schematic diagram of the internal structure of the double-layer weighing module of this utility model.

[0039] Figure 5 This is a schematic diagram of the connection structure between the positioning base and the connecting plate in the double-layer weighing module of this utility model.

[0040] Figure 6 This is a schematic diagram of the limiting mechanism in the double-layer weighing module of this utility model.

[0041] Figure 7 This is a schematic diagram of the double-layer weighing module of this utility model in the transportation state.

[0042] Figure 8 This is a schematic diagram of the double-layer weighing module of this utility model in working condition.

[0043] [Attached image labels]

[0044] Upper mounting plate 10

[0045] Lower mounting plate 20

[0046] First weighing sensor 30

[0047] Second weighing sensor 40

[0048] Rocker assembly 50

[0049] Horizontal clearance tie rod 60

[0050] Rocker column 51

[0051] Adjust the pressure head 52

[0052] The first end of the rocker column 511

[0053] First mounting hole 31

[0054] Second mounting hole 41

[0055] 512, the second end of the rocker column

[0056] Third mounting hole 521

[0057] Horizontal tie rod 61

[0058] First connecting post 62

[0059] Second connecting post 63

[0060] Horizontal limit device 70

[0061] Positioning base 71

[0062] Connecting plate 72

[0063] Limiting mechanism 73

[0064] Connector 80

[0065] Connector 721

[0066] Fixing part 722

[0067] Fastener 90

[0068] 711 base plate

[0069] Side panel 712

[0070] First connecting hole 723

[0071] Second connecting hole 713

[0072] Lifting Protection Kit 100

[0073] Substrate 731

[0074] Limit plate 732

[0075] 733 convex surface

[0076] 734 Handle Detailed Implementation

[0077] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0078] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present invention will now be described in detail, examples of which are shown in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts.

[0079] Furthermore, although the terminology used in this invention is selected from commonly known and used terms, some terms mentioned in this specification may have been selected by the applicant in his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein.

[0080] Furthermore, it is required that this utility model be understood not only through the actual terminology used, but also through the meaning implied by each term.

[0081] like Figures 1 to 4 As shown, this utility model discloses a double-layer weighing module, including an upper mounting plate 10, a lower mounting plate 20, a first weighing sensor 30, a second weighing sensor 40, and a rocker assembly 50. The first weighing sensor 30 is mounted on the lower end surface of the upper mounting plate 10. The second weighing sensor 40 is mounted on the upper end surface of the lower mounting plate 20, with the loading ends of the first and second weighing sensors 30 and 40 vertically aligned. Preferably, the first and second weighing sensors 30 and 40 are arranged to be vertically parallel and aligned. The rocker assembly 50 is installed between the loading ends of the first and second weighing sensors 30 and 40, transferring the weight of the material to the second weighing sensor 40.

[0082] In this embodiment, the first weighing sensor 30 and the second weighing sensor 40 are preferably beam-type weighing sensors. The fixed end of the first weighing sensor 30 is connected to the upper mounting plate 10, and the fixed end of the second weighing sensor 40 is connected to the lower mounting plate 20. The loading ends of the first weighing sensor 30 and the second weighing sensor 40 are connected vertically by a rocker assembly 50.

[0083] refer to Figure 4 The rocker assembly 50 may preferably include a rocker 51 and an adjusting head 52. A first mounting hole 31 is provided on the lower end face of the first weighing sensor 30, and the first end 511 of the rocker 51 is installed in the first mounting hole 31. A second mounting hole 41 is provided on the upper end face of the second weighing sensor 40, and the adjusting head 52 is installed in the second mounting hole 41. The second end 512 of the rocker 51 is connected to the adjusting head 52. For example, a third mounting hole 521 is provided on the adjusting head 52, and the second end 512 of the rocker 51 is installed in the third mounting hole 521.

[0084] In this embodiment, the function of the rocker assembly 50 is to adjust the reasonable spacing of the products and protect the pressure-bearing surface of the lower sensor (i.e., the second weighing sensor 40) from damage. The first weighing sensor 30, located on the upper layer, is in partial contact with the rocker 51 and has little relative movement. Therefore, in this application, the lower layer of the rocker assembly 50 adopts the structure of the adjusting pressure head 52, which can better position the rocker 51, and the adjusting pressure head 52 is fixed to the second weighing sensor 40.

[0085] The double-layer weighing module may also include at least one pair of horizontal gap rods 60, with one end of the horizontal gap rod 60 connected to the lower end face of the upper mounting plate 10 and the other end connected to the upper end face of the lower mounting plate 20, located on both sides of the first weighing sensor 30 and the second weighing sensor 40.

[0086] Preferably, each horizontal gap tie rod 60 includes a horizontal tie rod 61, a first connecting post 62 and a second connecting post 63. The first connecting post 62 is installed on the lower end face of the upper mounting plate 10, and the second connecting post 63 is installed on the upper end face of the lower mounting plate 20. The two ends of the horizontal tie rod 61 are respectively connected to the first connecting post 62 and the second connecting post 63.

[0087] Furthermore, the double-layer weighing module may also include a protective limiting device 70, which can be used for preventing tipping and limiting the horizontal movement of the weighing module. The protective limiting device 70 is installed between one end of the upper mounting plate 10 and the lower mounting plate 20, allowing for relative movement between the upper mounting plate 10 and the lower mounting plate 20. See also... Figure 1 The protective limiting device 70 may preferably include a positioning base 71, a connecting plate 72, and a limiting mechanism 73, fixing the positioning base 71 to the upper end face of the lower mounting plate 20. The first end of the connecting plate 72 is fixed to the lower end face of the upper mounting plate 10 (e.g., Figure 1 The upper end of the connecting plate 72 shown in the figure), the second end of the connecting plate 72 extends downward and is connected to the positioning base 71 by the connector 80, and there is a movement gap at the connection.

[0088] Alternatively, the mounting base 71 can be fixed to the lower end face of the upper mounting plate 10, the first end of the connecting plate 72 can be fixed to the upper end face of the lower mounting plate 20, and the second end of the connecting plate 72 can be connected to the positioning base 71 with a movement gap at the connection. This movement gap allows relative movement between the upper mounting plate 10 and the lower mounting plate 20.

[0089] Here, the connector 80 is preferably a safety pin. The limiting mechanism 73 is detachably mounted and fixed between the connecting plate 72 and the positioning base 71.

[0090] In this embodiment, the connecting plate 72 is preferably an L-shaped structure, including a long strip connecting portion 721 and a fixing portion 722 protruding outward along the bottom end of the connecting portion. The top end of the connecting portion 721 is fixedly connected to the upper mounting plate 10. When the double-layer weighing module is in the transportation state, the fixing portion 722 of the connecting plate 72 is fixed to the limiting mechanism 73 and the positioning base 71 by the fixing member 90 to prevent the double-layer weighing module from moving during transportation.

[0091] Preferably, the positioning base 71 includes at least one side plate to which the connector 80 is laterally fixed. For example, as Figure 5 Combination Figure 1 As shown, the positioning base 71 includes a base plate 711 and two side plates 712, with the side plates 712 respectively arranged on both sides of the base plate 711 and extending upward along the base plate 711. Meanwhile, a first connecting hole 723 is provided on the connecting portion 721 of the connecting plate 72, and a second connecting hole 713 is provided on the side plates 712, with the connecting plate 72 extending between the side plates 712. A connector 80 passes through the first connecting hole 723 and the second connecting hole 713, connecting the connecting plate 72 and the side plates 712.

[0092] Here, the diameter of the first connecting hole 723 is larger than the diameter of the connector 80 (e.g., a pin), meaning there is a gap between the first connecting hole 723 and the connector 80. This ensures that the upper mounting plate 10 and the lower mounting plate 20 have relative movement space, allowing the sensor to deform. When the double-layer weighing module is in transport mode, the connecting plate 72, the limiting mechanism 73, and the positioning base 71 are fixed by the fixing member 90, and the connector 80 is suspended within the first connecting hole 723, meaning there is relative movement space between the first connecting hole 723 and the connector 80. When the double-layer weighing module is in working mode, and the upper mounting plate 10 is lifted upwards, the connecting plate 72 can move upwards. If the relative displacement between the connecting plate 72 and the positioning base 71 is too large, the first connecting hole 723 will collide with the connector 80, thereby limiting further displacement of the upper mounting plate 10.

[0093] Meanwhile, the connecting plate 72 and the positioning base 71 are connected by the connector 80 (e.g., a pin) and an effective gap, but they are not fixed, so the balancing is not affected. However, it can play a role in protecting the equipment in the event of tilting or horizontal impact.

[0094] In particular, such as Figure 1As shown, the double-layer weighing module is also equipped with a lifting protection kit 100, which is installed on the lower end face of the upper mounting plate 10, directly above the positioning base 71. When the double-layer weighing module is in operation, first loosen the fixing member 90 and remove the limiting mechanism 73, so that the connecting plate 72 and the positioning base 71 are separated from each other. At this time, rotate the lifting protection kit 100 downward to lift the upper mounting plate 10 upward, and move the connecting plate 72 until the connecting member 80 contacts the first connecting hole 723.

[0095] See Figure 6 The limiting mechanism 73 includes a base plate 731 and two limiting plates 732. The limiting plates 732 are respectively installed on both sides of the base plate 731 and extend upward along both sides of the base plate 731. The limiting mechanism 73 is installed between the positioning base 71 and the connecting plate 72. The limiting plates 732 are respectively located between the two side walls of the connecting plate 72 and the side plate 712 of the positioning base 71, and the limiting plates 732 are located below the connecting member 80.

[0096] The top of the limiting plate 732 is provided with a boss 733. When the double-layer weighing module is in the transportation state, the limiting mechanism 73 is inserted between the positioning base 71 and the connecting plate 72, and the boss 733 abuts against the connecting piece 80, thus playing a limiting role.

[0097] In addition, outwardly protruding handles 734 can be provided on both sides of the outer end of the base plate 731 of the limiting mechanism 73 to facilitate the insertion or removal of the entire limiting mechanism 73 by the operator.

[0098] See Figure 7 When the double-layer weighing module is in the process of transportation and installation, the limiting mechanism 73 is installed between the positioning base 71 and the connecting plate 72, and the connecting plate 72 is fixedly supported between the upper mounting plate 10 and the lower mounting plate 20, thereby protecting the upper and lower first weighing sensors 30 and second weighing sensors 40 from being under stress, and ensuring the safety of installation and transportation.

[0099] See Figure 8 After the double-layer weighing module is installed and in operation, the limiting mechanism 73 needs to be removed. Simply unscrew the lifting protection kit 100 to slightly detach the positioning base 71 from the connecting plate 72, and the limiting mechanism 73 used for transportation and installation can be removed. The removed limiting mechanism 73 can then be installed on the lower mounting plate 20 to prevent parts from falling off, and can be reused for future adjustments or maintenance. This allows for multiple uses of the limiting mechanism 73.

[0100] After the limit mechanism 73 is disassembled, screw on the lifting protection kit 100 so that both the first weighing sensor 30 and the second weighing sensor 40 are in working condition.

[0101] This application's dual-layer weighing module uses an adjustable rocker assembly for connection, effectively solving the problems of internal forces caused by thermal expansion and contraction and center position deviation during installation, ensuring more accurate and stable weighing. The dual-layer weighing module is suitable for installing various analog and digital sensors, can be used in conjunction with different instruments, and can function as a dual-layer scale for weighing, or as a combined weighing unit for both upper and lower scales.

[0102] As described above, this utility model's double-layer weighing module, as a single integrated structure, employs a face-to-face installation method for the weighing sensors. During weighing, multiple weighing modules form a unified weighing structure. During system commissioning, the upper and lower weighing modules can be configured as two weighing platforms, each capable of real-time monitoring of material addition and subtraction in equipment (e.g., material tanks). The double-layer weighing module can be used for weighing batching tanks, ensuring comparison and verification of batching weights, and guaranteeing reasonable weight variation and preventing significant deviations when weighing on both platforms. Simultaneously, when equipment (e.g., material tanks) is agitated, the weighing module provides a relatively stable structural system and a limiting structure design to prevent tank displacement.

[0103] This utility model also provides a weighing device, which includes the double-layer weighing module as described above.

[0104] Based on the structure of the aforementioned double-layer weighing module, the corresponding weighing method is as follows:

[0105] Using the double-layer weighing module as described above, the double-layer weighing module can be used as multiple scales, and can be used for weighing after the product is installed on the equipment.

[0106] When the dual-layer weighing module is working, the first weighing sensor and the second weighing sensor output the weight simultaneously.

[0107] If the difference between the weights output by the first weighing sensor and the second weighing sensor is within the allowable range, it indicates that the first weighing sensor and the second weighing sensor are in normal working condition, and the material is considered to have been added correctly.

[0108] If the difference between the weights output by the first weighing sensor and the second weighing sensor exceeds the allowable range, it indicates that either the first weighing sensor or the second weighing sensor is malfunctioning, and the malfunctioning weighing sensor needs to be located.

[0109] In this embodiment, the process of locating the faulty weighing sensor includes: loading a standard weight onto the dual-layer weighing module, and observing the weight increment output by the first and second weighing sensors. If the weight increment matches the value of the standard weight, the corresponding weighing sensor is working normally; otherwise, it is not working normally. Then, the working first or second weighing sensor (i.e., ensuring that the scale currently in use is accurate) is selected to continue the production process.

[0110] Finally, after the equipment (such as the material tank) has finished feeding, the weighing module that malfunctioned is inspected to troubleshoot the problem.

[0111] In summary, the present invention provides a double-layer weighing module and a weighing device including the module, which employs two weighing sensors arranged vertically opposite each other. The two sensors acquire the weighing weight separately, and by comparing the weighing weights, weighing errors can be detected in a timely manner. This enables real-time monitoring of the addition or subtraction of material to the object to be weighed, preventing the weighing module from malfunctioning.

[0112] For those skilled in the art, the above disclosure of utility models is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0113] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0114] Similarly, it should be noted that, in order to simplify the description of the embodiments disclosed in this application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of this application sometimes combines multiple features into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the object of this application requires more features than those mentioned in the claims. In fact, the embodiments have fewer features than all the features of the single embodiments disclosed above. Some embodiments use numbers describing the number of components or attributes; it should be understood that such numbers used in the description of embodiments are modified in some examples by the modifiers "approximately," "about," or "generally."

[0115] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A double-layer weighing module, characterized in that, The dual-layer weighing module includes: An upper mounting plate and a first weighing sensor, wherein the first weighing sensor is mounted on the lower end surface of the upper mounting plate; The lower mounting plate and the second weighing sensor are mounted on the upper surface of the lower mounting plate, and the loading ends of the first weighing sensor and the second weighing sensor are vertically opposite each other. A rocker assembly is installed between the loading ends of the first weighing sensor and the second weighing sensor, and the weight of the material to be weighed is transferred to the second weighing sensor through the rocker assembly.

2. The double-layer weighing module as described in claim 1, characterized in that, The first and second weighing sensors are beam-type weighing sensors. The fixed end of the first weighing sensor is connected to the upper mounting plate, and the fixed end of the second weighing sensor is connected to the lower mounting plate. The loading ends of the first and second weighing sensors are connected vertically via the rocker assembly.

3. The double-layer weighing module as described in claim 1, characterized in that, The rocker assembly includes a rocker and an adjusting pressure head. A first mounting hole is provided on the loading end of the first weighing sensor, and the first end of the rocker is installed in the first mounting hole. The second load cell has a second mounting hole on its loading end, the adjusting head is installed in the second mounting hole, and the second end of the rocker column is connected to the adjusting head.

4. The double-layer weighing module as described in claim 3, characterized in that, The adjusting pressure head has a third mounting hole, and the second end of the rocker column is installed in the third mounting hole.

5. The double-layer weighing module as described in claim 1, characterized in that, The first weighing sensor and the second weighing sensor are aligned vertically and horizontally.

6. The double-layer weighing module as described in claim 1, characterized in that, The double-layer weighing module also includes at least one pair of horizontal gap rods, one end of which is connected to the lower end face of the upper mounting plate and the other end is connected to the upper end face of the lower mounting plate, located on both sides of the first weighing sensor and the second weighing sensor.

7. The double-layer weighing module as described in claim 6, characterized in that, Each of the horizontal clearance rods includes a horizontal tie rod, a first connecting post, and a second connecting post. The first connecting post is installed on the lower end face of the upper mounting plate, and the second connecting post is installed on the upper end face of the lower mounting plate. The two ends of the horizontal tie rod are respectively connected to the first connecting post and the second connecting post.

8. The double-layer weighing module as described in claim 1, characterized in that, The double-layer weighing module also includes a protective limiting device, which is installed between one end of the upper mounting plate and the lower mounting plate, allowing for relative movement between the upper mounting plate and the lower mounting plate.

9. The double-layer weighing module as described in claim 8, characterized in that, The protective limiting device includes a positioning base and a connecting plate. The positioning base is fixed to the upper end face of the lower mounting plate, the first end of the connecting plate is fixed to the lower end face of the upper mounting plate, and the second end of the connecting plate is connected to the positioning base, with a movement gap at the connection. Alternatively, the positioning base is fixed to the lower end face of the upper mounting plate, the first end of the connecting plate is fixed to the upper end face of the lower mounting plate, and the second end of the connecting plate is connected to the positioning base, with a movement gap at the connection point; The relative movement between the upper mounting plate and the lower mounting plate is achieved through the movement gap.

10. The double-layer weighing module as described in claim 9, characterized in that, A connector is provided on the positioning base. A horizontal first connecting hole is opened at the second end of the connecting plate. The connector passes through the first connecting hole, and there is a movement gap between the first connecting hole and the connector.

11. The double-layer weighing module as described in claim 10, characterized in that, The positioning base includes at least one side plate, and the connector is laterally fixed to the side plate.

12. The double-layer weighing module as described in claim 10, characterized in that, The positioning base includes a base plate and two side plates, which are respectively arranged on both sides of the base plate and extend upward along the base plate; A second connecting hole is provided on the side plate, the connecting plate extends between the side plates, and the connector passes through the first connecting hole and the second connecting hole to connect the connecting plate and the side plate.

13. The double-layer weighing module as described in claim 9, characterized in that, The protective limiting device also includes a limiting mechanism, which is detachably installed between the connecting plate and the positioning base.

14. The double-layer weighing module as described in claim 13, characterized in that, The limiting mechanism includes a base plate and two limiting plates, which are respectively installed on both sides of the base plate and extend upward along both sides of the base plate. The top of the limiting plate is provided with a boss to limit the position of the limiting mechanism.

15. A weighing device, characterized in that, The weighing device includes a double-layer weighing module as described in any one of claims 1-14.

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